BUSSMANN FWH-35B NSNBC01 Fuse Holder

The BUSSMANN FWH-35B is a 35 A, 500 VAC very-fast-acting semiconductor fuse in the Bussmann FWH family. This stud-mount device protects fast-switching power-electronic circuits by interrupting fault currents quickly in 500 V class systems, and it carries an I²t rating of 34 A²s. It is UL Recognized with CSA and CE listings and is cataloged as FWH-35B. Its 500 V rating applies to UL labeling, making it suitable for applications such as power supplies, inverters, and motor drives where rapid fault isolation is required in 500 V environments. As part of Eaton Bussmann’s high-speed fuse lineup, the FWH-35B is documented in standard Bussmann catalog data sheets and is representative of the 35–40 A segment of the family, with broader options available for higher current ratings if your design scales. For designs needing reliable overcurrent protection in 500 V systems, the FWH-35B provides a proven, standards-aligned option within the Bussmann catalog that aligns with UL, CSA, and CE requirements.